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8-62.

What is the probability that x2 + 7x + k is factorable if 0 ≤ k ≤ 20 and k is an integer? Homework Help ✎

Think of all of the integer pairs that sum to 7. Their products are the possible values of k.

Since 0 is in the set of integers, there are a total of 21 integers.

The possible values of k are 0,6,10, and 12.